I've been using the Nuvaring for about two years without a problem, however yesterday I felt like I had not pushed a tampon in all the way and discovered it was my nuvaring. I had a lot of trouble pushing it back in and my muscles are very tight? I thought my cervix was low, but this is not the case. It's not "slipping" out, it's literally being pushed out. Today i could barely get it back in at all. Anyone know what could cause this or how to help?